Feed mechanism for wood-planing machines



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NLPETEVHS, PHOTO-LITHOGHAPHER, WASHINGTON, D C.

` UNITED STAT-Es PATENT OFFICE.

AUSTIN W. GOODELL, OF PHILADELPHIA, PENNSYLVANIA.

FEED MECHANISM FOR WOOD-PLANING MACHINES.

SPECIFICATION forming Apart of Letters Patent No. 239,161, dated March 22, 1881. Application led December 14, 1880. (No model.)

T o all whom it may concern:

Be it known that I, AUSTIN W. GfooDELL,A a citizen ofthe United States, residing in the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Feed Mechanism for Wood-Planing Machines, of which the following isa specification,reference being had to the accompanying drawings, wherein- Figure 1 is a vertical longitudinal section of a wood-planing machine with my improvements represented as applied thereto. Fig. 2 is a side elevation ot' the same. Figs. 3 and 4 are detail perspectivesof my improvements,

the former showing the cut-awaypressure-bar `and the latter' the pressure-roll.

Fig. 5 is a l detail elevation of my improved feeding pressure-rolls and an under feeding-roll, illustrati ing the feeding of boards of different thicknesses, the latter being represented in crossy section; and Fig. 6 is a detail view,partly in section, showing the manner of weighting my improved feeding pressure-rolls.

My invention has relation to wood-planing machines, and `llas for its object' to provide means whereby two or more boards of unequal thickness may be simultaneously and uniformly fed to one cutter-head. 4

Generallyheretofore planing-machines have been provided with a presser roll or rolls having a uniform diameter between the bearings, and operating to exert pressure upon boards fed on a lag-bed or roller beneath. The result has been thatlin feeding by such means, when two boards of unequal thickness were presented to the roll or rolls at the same time, the thicker one only would be taken properly, the thinner (owing to the eleva-tion of the presser-roll ef- 'ected by the thicker board) being untaken, or fed so slackly or imperfectly as to produce a chipping action of the cutters. Various remedies to counteract this defect have been heretofore suggested, such as making the presserroll in two sections of like diameter on the saine shaft, or forming said roll of a series of rings of like diameter; but none of these, so far as I am aware, have perfectly effected the object sought.

To remedy the defect suggested, so as to feed uniformly two boards of unequal thickness to the same cutter-head, is the object of my invention; and this I effect by providing two or more presser-rolls, each of which is of varying or unequal diametersthat is, each 5 roll,considered singly, being of less diameter in one half or part than in the other part, and the larger diameter of one roll being opposed to the smaller diameter or reduced portion of the other roll. Hence reducing the diameter of each roll for a part of its length and combining two such rolls so that the enlarged portion or full diameter of oneroll shall be opposed to the reduced portion of the other roll constitutes the primary feature of my invcn tion. The foregoing pressure-rolls are those which exert the pressure upon the boards, so as to produce the required traction necessary to have the boards taken up and fed `by the feeding-bed, and these maybe called the feeding presser-rolls.

My invention still further relates to con-- structing pressure-rolls which hold the boards down close to the cutter, so as to prevent said boards from fluttering while being planled in the manner of the presser-bar; and myinvention, in this connection, consists in constructing these last-named rolls also with reduced portions and combining the same, which. may be called the presser-roll,77 with the feeding pressure-rolls previously specified. y

My invention has for its further object to distribute the weight employed for holding down the feeding' pressure-rolls, so as to cause it to fall mainly upon the said rolls at contrary ends-tb at is, upon that portion of each roll which is of the larger diameter-the reduced portions of the rolls, which are inoperative for feeding purposes,` being thus relieved, in a great measure, of weight.

Referring to the annexeddrawings, A indicates the cutter-head of a planing-machine, and B alower feeding-bed, which may be either lag, as shown in Fig. 1, or roller, as shown in Fig. 5.

C and D represent pressure feeding-rolls, which are formed of varying diameters, each having a normal diameter for, say, one-half or any desired portion of its length, as shown at c and d, respectively, and reduced portions c and d', respectively, the reduced port-ion of one roll being opposed to the normal or en- TOO larged part of the other, as shown plainly in Figs 3 and 4.

E represents the presser-roll, which is also of reduced diameter for a portion of its length, the reduced part thereof being in line with the larger diameter of the pressure feeding-roll O nearest to it. In lieu of this presser-roll of varying diameter, I may employ a pressurebar, F, as shown in Figs. 3 and 1, cut away, as shown at f, in line with the larger part or diameter of the inner feeding presser-roll, C, or that nearest the cutter-head.

G Gl represent the weight rods, or rods which connect with the wei ght-lever, and which are located on opposite sides, respectively, of the machine, operating to hold the feeding pressure-rolls down to their work. Inasmuch as the operative part of each said roll is the larger end, it is desired to have the weight fall principally upon such end of the roll. To effect this the weight-rods G G are connected to the link-yokes H I on opposite sides of the Imiddles of said yokes, the weight-rod G being thus principally imposed on that end of the roller O which is of the greater diameter, while the weight ofthe rod G is imposed principally on the enlarged end of the roller D, the reduced parts of both of said rolls thus being Weighted only enough to balance said rolls evenly in their bearings.

The operation is as follows: Two boards of equal thickness may be fed simultaneously to the cutter, and both will be pressed uniformly by the rolls C and D and fed alike by the bed to the cutter-head, the larger part of each roll holding down the board in contact with it, the reduced parts of such rolls not coming in contact with the boards passing beneath such parts. Boards of unequal thickness may in like manner be fed to the same cutter simultaneously, as shown in Fig. 5, the feeding-rolls acting independently, one being elevated more than the other by the thicker board, but each roll exerting the necessary pressure and traction upon the board in contact with or passing beneath its larger part, and the reduced part of each roll being inoperative with respect to or elevated above the board passing beneath such reduced part, the pressureroll or the presser-bar, cut away as described, actin g conjoiutly 4with both feeding pressure-rolls or conjointly on the boards passing beneat-h both of Y the latter, while the described arrangement of the rods G and G with respect to the yokes produces the imposition of the proper'weight on both feeding-rolls at their larger ends. I have shown and described my invention as comprising only two pressure feeding-rolls of varyin g diameters, and have specified the same as affording means for uniformly and simultaneously feeding two boards to the cutter 5 but three or more such rolls may be employed,

being arranged successively to break joints-3,15.

e., have their normal or enlarged diameters in different lines longitudinally of the machine, Wh ereby three or more boards of unequal thickness may be fed at one time. So more than two boards of unequal thickness may be fed at one time, even with two rolls of reduced diameters iirst described, one of said rolls operating upon one, two, or more boards, and the other roll exerting traction upon one, two, or more other boards.

What I claim as my invention isl. In a planing-machine, the combination of two feeding pressure rolls, each bein g reduced in diameter for a portion of its length, and said rolls being arranged relatively to each other with the normal or larger end of one opposed to or in line with the reduced portion ofthe other, whereby two boards of different thicknesses may be simultaneously and uniformly fed to the cutter, substantiallyas shown and described.

2. In a planing-machine, a presser roll, E, of varyin g dialneters,in combination with feeding pressure-rolls each of which has its diameter reduced for a portion of its length, the reduced portion of one roll being opposed to the normal or unreduced part of the other roll, substantially aszand for the purpose set forth.

3. In combination with the feeding rolls C D, made each of varying diameters, and arranged with the reduced part of one opposed to or in line with the normal or unreduced part ot' the other, the weight-rods G G', secured to the yokes H I on opposite sides of the middles of said yokes, so as to impose the Weight principally upon the larger ends ot' the feeding presser-rolls, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 10th day ot' December, 1880.

AUSTIN W. GOODELL. lVitnesses:

JOHN Roneuus, SAML. J. VAN STAVOREN.

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